压力管道裂纹的J积分测量

J Integral Measurement on Pressure Pipeline's Fissure

简述了二维贴片云纹干涉法光学系统的构成和云纹干涉法求J积分的基本原理，提出了用二维贴片云纹干涉法测量J积分的技术，并由此实测了管道轴向裂纹尖端位移场和J积分值，给出了测试结果，并针对测试结果进行了分析，得出的结论认为，采用二维贴片云纹干涉法测试管道裂纹J积分有灵敏度高、光路简单、操作方便等优点。

This article briefly shows the optics system constituent of 2-dimensional stuck piece cloud interferential method and the fundamental principle evaluating integral with cloud interferential method,puts forward measuring J integral by using 2-di-mensional stuck piece cloud interferential methodand therefore practically measuring the point dis-placement field of pipeline's axial fissure and the Jintegral value and shows the test results- The au-thors analyses the test result and gains the conclu-sion that this method has the fo1lowing advan-tages: high in sensitivety,simple in optical path andconvenient in operation.